CARDIOVASCULAR system of the octopus
The cardiovascular system of an octopus is extremely important to its survival. This is because an octopus needs to maintain an extremely high blood pressure to be able to basic things like swim or hunt. Since octopuses are invertebrates, they rely on having very high blood pressure in order to move their tentacles.
Octopuses have three hearts. The main heart is called the systematic heart, while two smaller hearts pump blood to and from the gills. The two smaller hearts pump blood to the gills, where waste is exchanged for oxygen. The smaller hearts then bring the newly oxygenated blood to the systematic heart. From the systematic heart, the oxygenated blood is pumped to the rest of the octopus' body.
Octopuses have three hearts. The main heart is called the systematic heart, while two smaller hearts pump blood to and from the gills. The two smaller hearts pump blood to the gills, where waste is exchanged for oxygen. The smaller hearts then bring the newly oxygenated blood to the systematic heart. From the systematic heart, the oxygenated blood is pumped to the rest of the octopus' body.